30 Minutes to President's Club | No-Nonsense Sales #566 - 3 Brutal Sales Leadership Lessons (Avoid These Mistakes)
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Apr 21, 2026 
Mark Kosoglow, a CRO-level sales leader who scales teams at startups and public companies. He recounts three turning points that reshaped his approach to coaching, PIPs, and hiring. Topics include protecting rep selling time over busywork. reframing PIPs as coaching tools, and hiring for traits rather than pedigree. Clear intent, systems, and stage-fit drive better results.
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Turning One Email Mistake Into A Management Reset
- Mark Kosoglow had an 'oh shit' moment after forwarding a defensive email about a top rep (MS) and accidentally including that rep's manager on the thread.
- The confrontation forced Mark to learn management: call mentors, read, take courses, and prioritize protecting reps' selling time.
Self-Awareness And Protecting Rep Selling Time
- Leadership requires self-awareness: admit when you don't know something and proactively learn to lead the way you'd want to be led.
- The highest-value job of a sales leader is protecting reps' selling time from busywork and distractions.
Use PIPs To Coach Not To Quietly Fire
- Before starting a PIP, decide whether its purpose is to fire someone or to coach them back to performance.
- If you mean to coach, deliver the PIP as prescriptive, supportive coaching and state that success is achievable in the moment.